Diodes 74HCT138 - Manual (Page 6)

74HCT138
Document number: DS35489 Rev. 3 - 2
6 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Operating Characteristics (@T
A
= +25°C, unless otherwise specified.)
Parameter Test Conditions
V
CC
= 5V
Unit
TYP
C
pd
Power Dissipation Capacitance f = 1 MHz all outputs switching-no load 21 pF
Parameter Measurement Information
V
CC
Inputs
V
M
C
L
V
I
t
r
/t
f
4.5V 3 V 6ns V
CC
/2 50pF
5.0V 3 V 6ns V
CC
/2 15pF used for 5V typical test
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Inverting and Non Inverting Outputs
Notes: A . Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate ≤ 10 MHz
C. Inputs are measured separately one transition per measurement
D. t
PLH
and t
PHL
are the same as t
PD
Figure 1. Load Circuit and Voltage Waveforms